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#1
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Does a well need a vent on the cap?
Does a water well need a vent on the cap?
My wall has a weird cap because it once had as an old fashioned windmill setup. There is just one small hole, and the wires come out of there. It does allow venting around the wires, even if that is a small amount. The problem is that rain water can enter from that hole. I've always kept an upside down pail on it to prevent water and bugs from entering. We're doing some work to this well and a guy told me to just out silicone around the wires. I know that will seal the hole, but dont the well need some venting to allow air to displace the water that is pumped out? It would seem to me that not having a vent would make the pump work extra hard, and create a vacuum in the well, which might cause other problems. Or, does the water entering the well make up for the water removed? Anyone know? Thanks |
#2
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Does a well need a vent on the cap?
On Nov 23, 4:00*am, wrote:
Does a water well need a vent on the cap? My wall has a weird cap because it once had as an old fashioned windmill setup. *There is just one small hole, and the wires come out of there. *It does allow venting around the wires, even if that is a small amount. *The problem is that rain water can enter from that hole. *I've always kept an upside down pail on it to prevent water and bugs from entering. *We're doing some work to this well and a guy told me to just out silicone around the wires. *I know that will seal the hole, but dont the well need some venting to allow air to displace the water that is pumped out? *It would seem to me that not having a vent would make the pump work extra hard, and create a vacuum in the well, which might cause other problems. Or, does the water entering the well make up for the water removed? Anyone know? Thanks add height to the well top, so water cant enter. surface water in a well is a bad idea |
#3
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Does a well need a vent on the cap?
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#4
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Does a well need a vent on the cap?
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#5
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Does a well need a vent on the cap?
Yes, wells do need a vent. The vent should not allow surface water to
enter the well. The quote below is from: http://www.idph.state.il.us/envhealt...illedwlsFS.htm An approved well cap or seal shall be installed at the top of the well casing to prevent any contamination from entering the well at the surface. A well vent is required. The well vent pipe shall be at least ½ inch in diameter, 8 inches above the finished grade, and be turned down, with the opening screened with a minimum 24-mesh durable screen to prevent entry of insects. Only approved well casing material meeting the requirements of the IWWCC may be utilized. To prevent contamination, the annular space between the drill hole and the well casing shall be grouted below the pitless adapter or unit in accordance with the IWWCC. Dave M. |
#6
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Does a well need a vent on the cap?
On Wed, 23 Nov 2011 02:54:40 -0800 (PST), bob haller
wrote: On Nov 23, 4:00*am, wrote: Does a water well need a vent on the cap? My wall has a weird cap because it once had as an old fashioned windmill setup. *There is just one small hole, and the wires come out of there. *It does allow venting around the wires, even if that is a small amount. *The problem is that rain water can enter from that hole. *I've always kept an upside down pail on it to prevent water and bugs from entering. *We're doing some work to this well and a guy told me to just out silicone around the wires. *I know that will seal the hole, but dont the well need some venting to allow air to displace the water that is pumped out? *It would seem to me that not having a vent would make the pump work extra hard, and create a vacuum in the well, which might cause other problems. Or, does the water entering the well make up for the water removed? Anyone know? Thanks add height to the well top, so water cant enter. surface water in a well is a bad idea The well is plenty high. About 2 feet exposed casing and on a mound. It's just rain water that can get in. The rain water in itself is probably not bad, it's the dust and dirt the is on the cap, and water dripping off trees and such, that goes in with it that is the problem. Not to mention bugs. As to another reply, the well is 300ft. deep, the pump is at about 280 to 285 ft. down. |
#7
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Does a well need a vent on the cap?
On Nov 23, 5:35*pm, "Bob F" wrote:
Paul Drahn wrote: On 11/23/2011 1:00 AM, wrote: Does a water well need a vent on the cap? My wall has a weird cap because it once had as an old fashioned windmill setup. *There is just one small hole, and the wires come out of there. *It does allow venting around the wires, even if that is a small amount. *The problem is that rain water can enter from that hole. *I've always kept an upside down pail on it to prevent water and bugs from entering. *We're doing some work to this well and a guy told me to just out silicone around the wires. *I know that will seal the hole, but dont the well need some venting to allow air to displace the water that is pumped out? *It would seem to me that not having a vent would make the pump work extra hard, and create a vacuum in the well, which might cause other problems. Or, does the water entering the well make up for the water removed? Anyone know? Thanks All wells need an air vent. Not because of water, but because of air pressure changes. Your air pressure is always changing. Check your daily weather report and notice the change in barometric pressure. Your well is probably not very deep. My well is drilled to 650 ft. The water is down perhaps 500-550 feet. that is a lot of air space. The well cap allows air in and out of the well. Many times you can hear it whistling. Sealing the well would eventually create a vacuum and make the pump work much harder to get the water up and out of the well. It couldn't increase the back pressure more than a couple pounds. If it did, the water level would increase by almost the same amount, virtually canceling the change. Certainly not enough to "make the pump work much harder". My well has a small, well insulated building over the well. It is well insulated because it needs an electric heater to keep the outgoing water line from freezing. Here is what happens when the winter air here gets to -15. That occurs usually when a high pressure system passes over Central Oregon. The high pressure forces the -15 degree air through the vent in the well where the air expands, cooling the already frigid air to way below -15 degrees. This cold air causes the water in the pipe at the well top to freeze solid. A change of a few inches of mercury pressure could never cool air way below anything. A fraction of a degree at most.- I agree. That air is barely moving and going through a pipe intended to support free flow, not create a pressure differential like an orifice in an HVAC coil. Any change in temp is going to be very small. I can see the pipe freezing near the top of the well head just from the cold -15 air though, without additional cooling. I think the main issue today with having a well vent is to eliminate any negative pressure in the well. If you have negative pressure, it would make any small leaks worse that could possibly result in ground water getting in around a seal, etc. How much of an issue it really is, who knows. The OP could check with his local code office or try googling for his state info which might be online. |
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